Solution

MISTAKE

2 clues

Blunder

Word class: Common noun
Nature of clue: Synonym
Difficulty: Very easy
Sources: Boatload Puzzles

Other solutions to Blunder

Error

Word class: Common noun
Nature of clue: Synonym
Difficulty: Very easy
Sources: Boatload Puzzles

Other solutions to Error

Words are categorized by artificial intelligence: there can be mistakes.